33385840 has 40 divisors (see below), whose sum is σ = 79727040. Its totient is φ = 12992256.

The previous prime is 33385829. The next prime is 33385861. The reversal of 33385840 is 4858333.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33385840² = 2229228625011200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33385796 and 33385805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680 + ... + 8599.

It is an arithmetic number, because the mean of its divisors is an integer number (1993176).

Almost surely, 2^33385840 is an apocalyptic number.

It is an amenable number.

33385840 is an abundant number, since it is smaller than the sum of its proper divisors (46341200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33385840 is a wasteful number, since it uses less digits than its factorization.

33385840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11329 (or 11323 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 33385840 is about 5778.0481133338. The cubic root of 33385840 is about 321.9986883169.

It can be divided in two parts, 33385 and 840, that added together give a square (34225 = 185²).

The spelling of 33385840 in words is "thirty-three million, three hundred eighty-five thousand, eight hundred forty".